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应用生态学报 ›› 2003, Vol. ›› Issue (5): 785-788.

• 研究论文 • 上一篇    下一篇

两种羟基苯乙酸对大豆萌发的化感效应研究

阮维斌1, 刘默涵1, 黄斌2, 阎飞2, 王敬国2, 高玉葆1   

  1. 1. 南开大学生命科学学院, 天津 300071;
    2. 中国农业大学植物营养系, 北京 100094
  • 收稿日期:2002-09-19 修回日期:2003-04-03
  • 通讯作者: 阮维斌,通讯联系人.E-mail:caurwb@eyou.com
  • 基金资助:
    国家重点基础研究发展规划项目(G2000018601);国家自然科学基金资助项目(39870488)

Allelopathic effect of p-and m-hydroxy phenylacetic acid on soybean (Glycine max L.) germination

RUAN Weibin1, LIU Mohan1, HUANG Bin2, YAN Fei2, WANG Jingguo2, GAO Yubao1   

  1. 1. College of Life Science, Nankai University, Tianjin 300071, China;
    2. Department of Plant Nutrition, China Agricultural University, Beijing 100094, China
  • Received:2002-09-19 Revised:2003-04-03

摘要: 通过田间和室内试验相结合,利用高效液相色谱检测大豆根际土壤和残茬腐解液中的对羟基苯乙酸和间羟基苯乙酸的含量;在培养皿内研究两种酚酸对大豆生长抑制效应;研究了二者对大豆DNA熔点(Tm)的影响,并采用SDS-PAGE方法研究二者对根系蛋白合成的影响.结果表明,在大豆根际土壤和残茬腐解液中检测到对羟基苯乙酸;两种羟基苯乙酸处理后,大豆侧根数和主根长均显著减少,表现出明显的化感抑制效应,间羟基苯乙酸的抑制效应更明显;两种羟基苯乙酸使大豆DNA的熔点(Tm)下降,一些小分子蛋白的合成受到影响,从而抑制大豆生长,表现出典型的化感效应.

关键词: 大豆, 化感, 对羟基苯乙酸, 间羟基苯乙酸

Abstract: In present work the p hydroxy phenylacetic acid (PHPA) and m hydroxy phenylacetic acid(MHPA)in rhizospheric soil solutions and decomposed root residues were detected by High Performance Liquid Chromatography(HPLC), and their effects on soybean germination at the level of 0,30,60,150,300 and 600 mg·kg-1, on melting temperature of DNA at the level of 600 mg·kg-1 and on cytoplasm protein patterns at the level of 0,30,150,300 mg·kg-1 were also studied. PHPA and MHPA were detected in decomposed products of root residue and soil solutions collected from rhizosphere in which soil sickness was occurred, but not detected in soil on which soybean rotated with wheat. The standard samples of PHPA and MHPA were used for bioassay in Petri dish. The main root length and lateral root number of soybean were seriously reduced, even at the level of 30 mg·L-1 . Soybean germination and root growth were retarded seriously by MHPA,in contrast with PHPA.At the level of 600 mg·kg-1,the melting temperature (Tm) of soybean DNAwas increased sharply from 77℃ to 84.5 ℃ with PHPA,and from 77℃ to 88.5℃ with MHPA. Tm was affected markly by MHPA,compared to PHPA, and the result was consistent with that of bioassay. The cytoplasm protein patterns of soybean leaves were obtained from SDS PAGE,showing several low weight molecular proteins were affected, especially on 16.1kD and 20.2kD. The results implied that PHPA and MHPA had allelopathic effect on soybean,and might have a role in soil sickness of soybean.

Key words: Soybean (Glycine max L.), Allelopathy, Hydroxy phenylacetic acid

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